At the cellular level, vitamin B12 is involved in DNA synthesis and neuroprotection, acting as a cofactor for enzymes critical to these processes, such as methionine synthase and methylmalonyl-CoA mutase (72, 73)
After 8 weeks, wrinkles appear smoothed, dark circles are diminished, and skin tone is more even
This can result in shinier, more lustrous hair that looks and feels healthier
Monotherapy-versus-combination asymmetry
This improved blood circulation means more production of brain-derived neurotrophic factor (BDNF), which leads to an improvement in memory and thinking two things that are key to mental wellness
However, surgery for a meniscus tear may be necessary if: The tear created tissue that is impeding normal knee function